WO2016110210A1 - Dispositif et procédé de séchage de boue à séchage inférieur - Google Patents

Dispositif et procédé de séchage de boue à séchage inférieur Download PDF

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Publication number
WO2016110210A1
WO2016110210A1 PCT/CN2015/099778 CN2015099778W WO2016110210A1 WO 2016110210 A1 WO2016110210 A1 WO 2016110210A1 CN 2015099778 W CN2015099778 W CN 2015099778W WO 2016110210 A1 WO2016110210 A1 WO 2016110210A1
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WIPO (PCT)
Prior art keywords
sludge
drying
drying chamber
flipping
gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2015/099778
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English (en)
Chinese (zh)
Inventor
谭玮
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Guangzhou Environmental Creative Solutions Co Ltd
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Guangzhou Environmental Creative Solutions Co Ltd
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Filing date
Publication date
Application filed by Guangzhou Environmental Creative Solutions Co Ltd filed Critical Guangzhou Environmental Creative Solutions Co Ltd
Priority to US15/542,050 priority Critical patent/US10408538B2/en
Priority to KR1020177021162A priority patent/KR101969747B1/ko
Priority to EP15876710.3A priority patent/EP3243802B1/fr
Priority to JP2017536887A priority patent/JP6351859B2/ja
Publication of WO2016110210A1 publication Critical patent/WO2016110210A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/12—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices
    • F26B11/16—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices the stirring device moving in a vertical or steeply-inclined plane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/10—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/18—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs
    • F26B17/20—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs the axis of rotation being horizontal or slightly inclined
    • F26B17/205—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs the axis of rotation being horizontal or slightly inclined with multiple chambers, e.g. troughs, in superimposed arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/001—Handling, e.g. loading or unloading arrangements
    • F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/04—Agitating, stirring, or scraping devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying goods
    • F26B2200/18—Sludges, e.g. sewage, waste, industrial processes, cooling towers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/20—Sludge processing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/30—Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy

Definitions

  • the present invention relates to the field of sludge drying, and generally relates to a sludge drying device, and more particularly to a bottom drying sludge drying device in the form of a monomer and a sewage drying device The method of drying the mud.
  • the sewage treatment plant uses the method of concentration and dehydration to reduce the water content of the sludge from more than 90% to 60-80%, and then to fill, solidify or dry. Landfill is easy to ferment the sludge and cause secondary pollution.
  • the existing curing or drying equipment needs to consume a large amount of sludge due to its strong viscosity, easy to agglomerate and difficult to break. Energy, therefore, it is difficult to reduce costs and improve efficiency.
  • Chinese invention patent CN101186422A proposes a closed multi-chamber fluidized bed sludge drying method.
  • the fluidized bed used in this method is not only energy-intensive but also inefficient, and it is difficult to achieve continuous and large-scale sludge drying treatment.
  • a Chinese utility model patent CN201000261Y submitted and authorized by the present applicant proposes a sludge low temperature drying device. Although such a drying device can achieve a certain amount of sludge drying, it takes a long time, and thus consumes energy and does not achieve the intended purpose of improving drying efficiency.
  • the Chinese utility model patent CN203319838U proposes a sludge solidification treatment mixer.
  • the mixer mixes the sludge with the additive by stirring to achieve solidification of the sludge. This process not only does not remove the moisture in the sludge, but also increases the volume of the sludge and causes the solidified sludge to be reused. .
  • the present invention proposes a bottom dry sludge drying device in the form of a monomer.
  • the continuous shearing, crushing and turning of the sludge through the turning device in the first drying chamber causes the sludge to frequently contact with the drying gas, thereby solving the problem occurring during the sludge drying process.
  • the bridge member is formed by forming a communication port on the partition plate for partitioning the first drying chamber and the second drying chamber, and providing a bridge member above the communication port. Side openings are formed between the partitions.
  • the drying gas enters the first drying chamber from the second drying chamber through a curved path from the communication port to the side opening to dry the sludge from the bottom.
  • Drying gas from the second drying by scraping the side of the front end of the blade or the ratchet of the flipping assembly of the flipping device or the side edge of the scraping member fixed to the blade or ratchet The flow to the first drying chamber is smoother.
  • the speed at which the drying gas flows into the drying chamber but also the flow rate of the drying gas flowing out of the drying chamber can be increased by the arrangement of the air blowing device, the air guiding device or/and the heating device. It promotes the contact of dry gas with sludge and improves drying efficiency.
  • the drying device of the invention is basically a single form, and has the characteristics of high drying efficiency, low energy consumption, small occupied area and strong adaptability, and is completely suitable for the needs of the current market. Since the sewage treatment plants in densely populated cities are more dispersed, the monomer-based sludge drying device can be configured with little change in equipment in existing sewage treatment plants.
  • the sludge drying apparatus and method of the present invention continuously shears, crushes, and flips the sludge in the first drying chamber by using a flipping assembly of the turning device provided in the first drying chamber, while passing through the blades or ratchets provided in the flipping assembly
  • the side edge of the front end of the scrapable part that can be scraped off or fixed to the blade or ratchet scrapes off the sludge near the side opening to accelerate the drying of the sludge.
  • the sludge drying device and method of the invention can solve the problem that the sludge has strong viscosity and is easy to agglomerate,
  • the difficult problem of breaking can not only significantly remove the moisture in the sludge, but also transform the sludge from granular to powdery, thereby improving the drying efficiency of the sludge and reducing the energy consumption.
  • Figure 1 is a longitudinal cross-sectional view of a bottom dry sludge drying device of the present invention
  • Figure 2 is a transverse cross-sectional view of the sludge drying device of Figure 1;
  • Figure 3 is a perspective view of the first drying chamber of the sludge drying device of Figure 1;
  • Figure 4 is a perspective view showing the flipping device provided in the first drying chamber of Figure 3;
  • Figure 5 is a perspective view of the flipping device of the sludge drying device
  • Figure 6 is an enlarged perspective view of the bridge member in the portion A circled in Figure 1;
  • Figure 7 is a cross-sectional view of the bridge of Figure 6 taken along the longitudinal direction of the housing;
  • Figure 8 is a partial cross-sectional view of another embodiment of a bridge
  • Figure 9 is a view of the bridge of Figure 6 as seen in the longitudinal direction of the housing;
  • Figure 10 is a perspective view of the second drying chamber of the sludge drying device of Figure 1;
  • Figure 11 is a transverse cross-sectional view showing another embodiment of the bottom dry type sludge drying apparatus of the present invention.
  • FIG. 1 shows a preferred embodiment of the bottom dry sludge drying apparatus of the present invention
  • FIG. 2 is a cross-sectional view taken along the transverse direction of the sludge drying apparatus of FIG. 1, in which a monomer is schematically shown.
  • the bottom dry sludge drying device 1 comprises a casing, wherein a partitioning plate 4 is provided in the casing to separate the inner space of the casing from the two chambers as the first drying chamber 6a and the second drying chamber 6b .
  • a communication port 5 for communicating the first drying chamber 6a and the second drying chamber 6b is formed on the partitioning plate 4 to enable the drying gas to enter the first drying chamber 6a from the second drying chamber 6b.
  • the housing generally comprises a body 2, an upper cover (or cover) 3 and a bottom plate 4a, wherein the upper portion of the body 2, the upper cover 3 and the partition plate 4 constitute a first drying chamber 6a, and the lower portion of the body 2 is separated
  • the plate 4 and the bottom plate 4a constitute a second drying chamber 6b.
  • the housing may be constructed of a plurality of components or a plurality of ways, for example, the upper portion of the body 2 is integrally formed with the partitioning plate 4, wherein the partitioning plate is The upper surface serves as the bottom of the first drying chamber 6a, and the lower portion of the body 2 is fixed to the partitioning plate to use the lower surface of the partitioning plate as the top of the second drying chamber 6b.
  • the lower portion of the body 2 may be integrally formed with the partitioning plate 4, or the bottom plate 4a may be eliminated, the body 2 may be placed on the ground, or the like.
  • the shape of the body 2 is rectangular, but may be square, polygonal, elliptical or other shapes.
  • a feed port 8 for allowing the sludge to be dried or dried to enter the first drying chamber and an exhaust gas or a drying gas for discharging the dried sludge are respectively provided on the upper cover 3 of the casing.
  • the exhaust port 10 is provided with a discharge port 9 for the dried sludge on the end wall of the upper portion of the body 2 in the vicinity of the partition plate 4 away from the feed port 8.
  • the feed port 8 and the exhaust port 10 for the first drying chamber can be placed at any position on one of the body 2 and the upper cover 3, that is, the first drying chamber 6a, as needed. Any position of the upper part.
  • the discharge opening 9 may be provided at any position of the upper portion of the body 2 including the side wall and the circumferential wall of the end wall, that is, any position of the circumferential wall of the first drying chamber 6a.
  • Figure 3 shows a preferred embodiment of the first drying chamber of the sludge drying device, wherein a plurality of spaced apart rectangular communication ports 5 are formed on the partition plate 4 and a bridge is provided above each of the communication ports Item 401.
  • the communication port 5 may have various shapes such as a trapezoid, a rectangle, a triangle, an arch, a circle, etc., and one or more communication ports may be provided.
  • the communication port 5 has no shape and number restrictions and can be determined as needed.
  • the bridge above the communication port can also be changed correspondingly based on the shape of the communication port.
  • the plurality of communication ports 5 are arranged in groups along the longitudinal direction G of the casing, and the plurality of communication ports 5 in each group are spaced apart from each other by a certain distance.
  • the longitudinal direction X of each of the communication ports 5 intersects with the longitudinal direction G of the casing, preferably perpendicular to each other.
  • Fig. 4 shows a preferred embodiment in which a flipping device is provided in the first drying chamber of Fig. 3, in which two flipping devices 7a, 7b for turning the sludge are arranged parallel to each other in the longitudinal direction G of the casing. Since the two flipping devices 7a, 7b have the same or similar configuration, only one of the flipping devices such as the flipping device 7a will be described in detail.
  • the turning device 7a has a rotating shaft 701a and a turning assembly 702a fixed to the rotating shaft 701a for turning the sludge.
  • the flip assembly 702a includes four vanes or ratchets 703a, and each vane or ratchet 703a extends radially outward from the rotational axis 701a.
  • the flip assembly 702a that rotates with the rotating shaft 701a is similar in contour to the blades of the propeller.
  • the shape of the flipping member 702a is not limited thereto, and the flipping member 702a may be designed to resemble the shape of a gear.
  • One or more flipping assemblies 702a may be disposed on the rotating shaft 701a, and each flipping assembly 702a may One or more blades or ratchets 703a are included.
  • the length of the plurality of blades or ratchets 703a of each flipping member 702a extending from the rotating shaft 701a may be different from each other, and at least one of the plurality of flipping assemblies 702a may have longer length blades or ratchets Other flipping components may have shorter length blades or ratchets.
  • the illustrated blade or ratchet is fixed to the rotating shaft 701a by welding, other fixing means such as bolting, riveting, or the like may be employed, for example, the blade or ratchet may be connected or fixed to the collar, the bushing or the hub ( Not shown), the collar is then mounted on the rotating shaft 701a. Both ends of the rotating shaft 701a may be mounted in one of the holes 201a or 201b on the opposite end walls of the body 2 by bearings, as shown in FIG.
  • the drying gas (arrow shown in FIG. 1) enters the first drying chamber 6a from the second drying chamber 6b through the communication port 5 on the partitioning plate 4, and is discharged from the exhaust port 10 after interacting with the sludge, Thereby increasing the chance of the dry gas coming into contact with the sludge, however, after the sludge to be dried is discharged from the feed port 8 to the first drying chamber 6a and stacked on the partitioning plate 4, with the turning devices 7a, 7b
  • the flipping of the flipping members 702a, 702b and the action of the drying gas, a part of the sludge may fall or leak from the first drying chamber 6a through the communication port 5 into the second drying chamber 6b.
  • the bridge member 401 is disposed above the communication port 5 to block the leakage of the sludge through the communication port to the second drying chamber 6b by the bridge member 401.
  • the partitioning plate 4 between the first drying chamber 6a and the second drying chamber 6b is a curved plate, and may also be a flat plate having a concave upper surface.
  • the shape of the partitioning plate 4 in the cross section is downwardly curved or has a concave upper surface, that is, a curved section of the depressed portion from the first drying chamber 6a protrudes downward toward the second drying chamber 6b, or the first drying chamber 6a has a concave bottom. Therefore, the partition plate is shown as a recessed area in the longitudinal direction G of the casing. As shown, the area of the curved partitioning plate 4 facing each of the two flipping devices 7a, 7b is concave, preferably each recessed area corresponds to the flipping assembly 702a, 702b and is concave The area can be circular.
  • the bridge member disposed above the communication port may be a plate member including a flat plate, a curved plate, a herringbone plate, or the like.
  • the bridge member 401 may be disposed on one or more of the communication ports 5, and the number of the communication ports and the bridge members need not be in one-to-one correspondence.
  • the bridge 401 is disposed to straddle the communication port 5 in the longitudinal direction of the communication port and is substantially parallel to the longitudinal direction X of the communication port 5.
  • the length of the bridge member 401 is longer than the length of the communication port 5, so that the bridge member 401 can be spanned over the communication port 5 in the longitudinal direction of the communication port 5 like a bridge, and the two ends thereof are respectively fixed to the communication port.
  • the intermediate portion of the bridge member 401 is located above the communication port 5, thereby forming a side opening 402 between the bridge member 401 and the partition plate 4, and a side opening 402 may be formed on one side of the bridge member 401 or One side opening 402 is formed on each side.
  • the bridge 401 above the communication port 5 is advantageous for reducing sludge from the first drying chamber 6a or leaking to the second drying chamber 6b, the sludge accumulated near the side opening also interferes with the drying gas from the second.
  • the drying chamber 6b enters the first drying chamber 6a.
  • the blades or ratchets 703a, 703b of the flip assembly 702a, 702b are designed to scrape sludge adjacent the side opening 402 of the bridge 401.
  • the spacing of the flipping members 702a, 702b of the flipping devices 7a, 7b on the rotating shafts 701a, 701b can be determined according to the distance between the plurality of communicating ports or the bridges in each row on the partitioning plate 4 to ensure rotation.
  • the front end of the longer blade or ratchet 703a, 703b on each of the flipping assemblies 702a, 702b or the side edge of the front end of the scrapable members 704a, 704b mounted on the blade or ratchet 703a, 703b can be scraped In addition to the side opening 402 of the bridge 401.
  • the outer peripheral or top protruding portion or the side edge of the tooth can be used to flip the sludge, as shown in Figures 2 and 4, the two turning devices 7a, 7b are arranged
  • the first flipping assembly 702a on the first rotating shaft 701a and the second flipping assembly 702b on the second rotating shaft 701b are respectively corresponding to the two rows of spaced-apart communication ports 5 or the bridges 401 thereon.
  • the length of the blades or ratchets 703a, 703b of the flipping members 702a, 702b of the flipping devices 7a, 7b can be made long enough so that When the flipping assemblies 702a, 702b rotate with the rotating shafts 701a, 701b, the side edges of the leading ends of the blades or ratchets can scrape the sludge near the side openings 402.
  • at least one of the plurality of flipping assemblies 702a, 702b can have at least one blade or ratchet 703a, 703b whose front end can scrape the sludge.
  • the number of flipping members 702a, 702b does not have to correspond one-to-one with the number of the communication ports 5 or the bridge members 401 thereon.
  • FIG. 5 shows another embodiment of a flipping device.
  • the flipping device 7 has a rotating shaft 701 and a turning assembly 702 fixed to the rotating shaft, wherein the turning assembly 702 is provided with blades or ratchets 703, and the front end of the blades or ratchets 703 can be used to scrape the sludge.
  • a scrapable member 704 is mounted on the blades or ratchets 703 of the two flipping assemblies 702, wherein the blades or ratchets on which the scraping members are mounted are of the same length as the other blades or ratchets and are mounted on the blades or spines
  • the scraping member on the tooth acts the same as the scrapable front end of the other blade or ratchet.
  • the blades or ratchets of the flip assembly 702 can be made to different lengths and the scrapable components can be mounted on shorter blades or ratchets, such as their front ends, as desired. 704.
  • Figures 6 and 7 show the bridge in the circled portion A of Figure 1 in a perspective view and a cross-sectional view, respectively, wherein the scraping front end of the blade or ratchet 703 of the flipping assembly is in the bridge 401 and separated A side opening 402 is formed between the plates 4.
  • the flip assembly 702 fixed to the rotating shaft is disposed to correspond to the bridge such that the scraping front end of the blade or ratchet 703 of the flipping assembly 702 or the front end of the scrapable member fixed to the blade or ratchet
  • the edge faces the side opening of the bridge member, so that the sludge near the side opening of the bridge member is scraped off when the flipping assembly rotates, so that the dry gas that has entered the communication port 5 smoothly enters the first drying through the side opening 402. Room 6a.
  • the blades or ratchets of the flipping assemblies 702a, 702b also function to shear, break and flip the sludge.
  • the blade or ratchet of the flipping assembly with the scrapable front end or the blade or the ratchet with the scraping member fixed to the front end thereof may be located between the two bridge members 401 so that the front end of the blade or ratchet or A side edge of the front end of the scrapable member fixed to the blade or ratchet can sweep the side opening 402 of the opposite side of the two bridge members 401.
  • Fig. 8 shows another embodiment of the bridge, wherein the side flaps 403 are provided in the width direction of the bridge 401, that is, in a direction substantially transverse to the longitudinal direction G of the housing to open one of the sides
  • the plug 402 is blocked, and only the other side opening 402 is retained, thereby allowing the drying gas to enter the first drying chamber 6a in one direction.
  • the side dam 403 is disposed in the side opening 402 along the length of the bridge 401 to prevent dry gas from passing therethrough, so that the tumbling assembly 702 of the flipping device 7 can only scrape the sludge near the other side opening 402.
  • This arrangement of the baffle 403 is such that the drying gas flows out of the side opening 402 into the first drying chamber 6a in only one direction, preventing the drying gas from entering the first drying chamber from the opposite direction, and also reducing sludge leakage.
  • Figure 9 shows the position of the bridge of Figure 6 on the dividing panel as seen in the longitudinal direction of the housing, wherein the leading end of the blade or ratchet 703 of the flipping assembly is near the bottom of the drying chamber, and the blade or spine
  • the distance between the top end of the tooth 703 and the partition plate is substantially equal within the scraping range. It can be understood that when the rotating shaft of the turning device or the hole for mounting the rotating shaft is adjusted in the vertical direction of the housing, the distance from the axis of the rotating shaft to the partition plate will be changed, and therefore, the blade or the spine can be selected.
  • the length of the teeth is used to determine the distance from the tip of the blade or ratchet to the divider to determine the amount of sludge to be scraped.
  • the size of the flipping device is selected such that the distance r from the axis of the rotating shaft to the tip of the longer blade or ratchet of the flipping assembly is smaller than the radius R of the concave arcuate region of the dividing plate of the curved surface. Due to the axis of rotation of the flipping devices 7a, 7b 701a, 701b are disposed in parallel with the longitudinal direction G of the casing, and therefore, the rotating shaft intersects with the longitudinal direction of the communication port or the bridge member, preferably perpendicular to each other, and therefore, the opening direction of the side opening 402 and the axial direction of the rotating shaft or the shell The longitudinal direction G of the body is substantially parallel.
  • the drying gas After flowing into the communication port 5, the drying gas needs to be turned through the side opening to reach the first drying chamber 6a. Similarly, the sludge also needs to pass through a curved path from the side opening 402 to the communication port 5 to leak from the first drying chamber 6a to the first The second drying chamber 6b, therefore, the amount of sludge leakage will be greatly reduced.
  • the scraping of the sludge near the side opening 402 not only reduces the amount of sludge leakage but also accelerates the flow of the drying gas and improves the drying efficiency of the sludge.
  • the blade or ratchet scraping front end of the first turning assembly 702a on the first rotating shaft 701a is fixed to the blade or ratchet.
  • the front end of the upper scrapable member is adjacent to the second rotational axis 701b and located between two adjacent second flipping assemblies 702b, and vice versa. This shortens the axial spacing between the first rotational axis 701a and the second rotational axis 701b, and also avoids interference between the first flipping assembly 702a and the second flipping component 702b.
  • two adjacent flipping assemblies on the same rotating shaft may form a group, and each set of flipping assembly 702a on the first rotating shaft 701a and each set of flipping assemblies 702b on the second rotating shaft 701b Arranged in a staggered manner such that a set of flipping assemblies 702a on the first axis of rotation 701a are located between adjacent sets of flipping assemblies 702b on the second axis of rotation 701b.
  • an adjacent three flipping assemblies on the same rotating shaft may be grouped, and each set of flipping assemblies on each rotating shaft is staggered with each set of flipping assemblies on the other rotating shaft. .
  • the flipping assembly corresponds to the plurality of communicating ports 5 or the bridges 401 thereon so as to flip the blades or ratchets 703a of the components 702a, 702b,
  • the scrapable front end of the 703b or the front end of the scrapable members 704a, 704b fixed to the blade or the ratchet can scrape the sludge near the side opening 402 of the bridge 401 to smoothly flow the dry gas into the first drying. Room 6a.
  • the position of the communication port or bridge on the divider plate is associated with the position of the flip assembly on the axis of rotation.
  • one end of the rotating shafts 701a and 701b of the first flipping device 7a and the second flipping device 7b may be respectively provided with a power input member connected to a transmission (not shown).
  • the transmission is driven by an external power unit, and the transmission sequentially drives the rotation shafts 701a and 701b to rotate, so that power input members such as gears or pulleys 18a on the rotation shafts 701a and 701b drive one of the rotation shafts 701a and 701b, thereby making the other
  • the first rotating shaft 701a and the second rotating shaft 701b can be rotated in opposite directions with respect to each other. It is also possible to rotate together in the same direction.
  • the shape of the side opening 402 depends on the shape of the lower surface of the bridge 401 and the partitioning plate.
  • the shape of the cross section of the recessed portion of the partitioning plate 4 and the scraping tip of the blade or ratchet 703a, 703b of the flipping assembly 702a, 702b of each of the flipping means 7a, 7b are fixed to the blade or ratchet.
  • the rotational trajectories of the tips of the scrapable members 704a, 704b match.
  • the side opening 402 has a crescent shape.
  • the radius R of the curved partition plate facing the concave arcuate region of the flipping device is slightly larger than the distance r from the axis of the rotating shaft to the tip end of the flipping assembly.
  • FIG 10 shows a preferred embodiment of a second drying chamber of the sludge drying unit.
  • the second drying chamber 6b includes an air inlet 15 provided on one side of the lower portion of the body 2, that is, the air inlet 15 is located on the side wall or bottom of the second drying chamber 6b for drying of the sludge to be dried
  • the gas enters the second drying chamber 6b, and the air inlet may be one or more.
  • a cleaning port 15a is provided at one end of the lower portion of the body 2, that is, a cleaning port 15a is provided on the end wall of the second drying chamber 6b near the bottom thereof.
  • the cleaning port 15a is for discharging the sludge deposited in the second drying chamber 6b.
  • the cleaning opening 15a may be provided on the circumferential wall or the bottom including the side walls and the end walls.
  • a discharge device 25 is provided in the second drying chamber 6b at a position close to the bottom plate 4a.
  • the discharge device 25 may be a screw conveyor, but it may also be a belt conveyor, a net chain conveyor, a gas conveyor, or the like.
  • the auger has a rotating shaft 25a and a screw 25b fixed to the rotating shaft 25a, wherein the rotating shaft 25a is supported on the end wall of the lower portion of the body 2, and one end thereof is provided with a power input member 25c, and the other end is extended to the cleaning Port 15a.
  • the transmission drives the rotating shaft 25a to rotate
  • the screw 25b conveys the sludge to the cleaning port 15a at one end of the second drying chamber 6b and discharges the casing.
  • the second drying chamber 6b is substantially funnel-shaped in the lateral direction, and the side walls thereof, that is, the side walls of the lower portion of the body 2 are gradually narrowed toward the bottom plate 4a, and the shape at the narrowed portion, that is, the bottom plate 4a is curved or half.
  • the radius of the circular, curved or semi-circular shape is slightly larger than the radius of the rotational trajectory of the outer periphery of the spiral 25b, such that a longitudinal passage of an arcuate cross section is formed at the bottom of the second drying chamber 6b.
  • the sludge leaking from the first drying chamber 6a through the side opening 402 may be collected into the longitudinal passage of the arcuate section so as to be conveniently discharged out of the casing by a screw conveyor provided in the longitudinal passage.
  • the sludge leaking into the second drying chamber 6b may be dried or secondarily dried by the drying gas entering the second drying chamber 6b to further reduce the moisture content of the sludge.
  • a discharge opening and a detachable plate that blocks the discharge opening may be formed on the side wall of the lower portion of the body 2.
  • the detachable plate can be removed to remove the sludge, thereby ensuring the smooth flow of the drying gas in the second drying chamber 6b.
  • a movable shutter 29 may be provided at the cleaning port 15a so that the drying gas does not leak, and the movable shutter 29 is opened when the sludge is discharged.
  • the sludge drying apparatus 1 further includes an air blowing device 12 not shown in Fig. 1, wherein the air blowing device 12 communicates with the second drying chamber 6b via a duct 12a and a gas inlet 15 to discharge dry gas. It is blown into the second drying chamber 6b.
  • the sludge drying device 1 may further include an air guiding device 13, wherein the air guiding device 13 communicates with the first drying chamber 6a via the duct 13a and the exhaust port 10.
  • the drying gas delivered into the second drying chamber 6b may be a drying medium such as a hot gas, a chemical-containing gas, hot air, a normal temperature gas or a freezing gas, or a specially prepared drying medium.
  • the air blowing means 12 can be used to increase the speed at which the drying gas flows into the second drying chamber 6b, and the air guiding means 13 can accelerate the outflow of the exhaust gas from the first drying chamber 6a.
  • the air blowing device may be a blower or a fan, and the air guiding device may be an induced draft fan.
  • the air blowing device 12 may be replaced with a supercharging device to deliver the drying gas to the second drying chamber 6b at a certain pressure, so that the drying gas is accelerated to flow into the first drying chamber 6a. It is also possible to replace the air guiding device 13 with a pressure reducing device to speed up the flow of the exhaust gas, thereby improving the sludge drying efficiency.
  • the drying gas delivered into the second drying chamber 6b may be heated, and the heating device (not shown) may be separately disposed at an upstream position or a downstream position of the air blowing device, or may be combined with the air blowing device. Integrated together.
  • the heated drying gas is sent to the second drying chamber 6b by the air blowing device or the charging device to re-dry the sludge therein. While the heated drying gas is subjected to secondary drying of the sludge dropped or leaked into the second drying chamber 6b, a part of the heat may be transferred to the laying body by the body 2 and the partitioning plate 4 made of a metal material.
  • the sludge on the partition plate 4 serves to assist the drying of the sludge in the first drying chamber 6a.
  • the sludge can be dried using the bottom dry sludge drying apparatus 1 of the present invention.
  • a conveying device not shown It is sent into the first drying chamber 6a, and the external power device drives the rotating shaft to rotate through the transmission device and the power input member, thereby driving the turning assembly to rotate.
  • Each blade or ratchet of the flip assembly continuously flips the sludge.
  • the flipping assembly continuously shears, crushes, and flips the sludge
  • the at least one blade or ratchet scraping front end of the flipping assembly or the side edge of the front end of the scrapable member mounted on the blade or ratchet is fixed
  • the sludge near the side opening 402 is scraped off at intervals.
  • the air blowing device 12 delivers the dry gas to the second drying chamber 6b via the duct 12a and the gas inlet 15.
  • the flow rate of the drying gas into the second drying chamber 6b is associated with the blowing speed.
  • the scraping of the sludge near the tip end of the blade or ratchet of the flipping assembly or the front end of the scrapable member mounted on the blade or ratchet to the sludge near the side opening 402 facilitates the drying gas entering the first drying chamber 6a.
  • the blade or ratchet of the flipping assembly in the first drying chamber 6a shears, breaks and flips the sludge and the drying effect of the drying gas on the sludge, the granularity of the sludge gradually becomes smaller and the powder is granulated, thereby fouling
  • the dryness of the mud is also increasing.
  • the drying gas is sent to the atmosphere or the gas treatment system by the air introducing means 13 through the exhaust port 10 located at the upper portion of the first drying chamber 6a and the duct 13a for subsequent processing. After drying, the moisture content of the sludge is significantly reduced and discharged from the discharge port 9.
  • the rotational trajectory of the tip of the flipping assembly of the flipping device or the tip of the blade or the ratchet or the scrapable member is in contact with the communicating opening 5 of the curved partitioning plate 4 or the concave curved shape of the vicinity of the bridge 401
  • the matching helps the sludge to be dried entering the first drying chamber 6a to accumulate in a lower position of the concave curved region.
  • the discharge device 25 can be continuously or intermittently operated. Therefore, the sludge leaking from the first drying chamber 6a into the second drying chamber 6b can be slid down along the side wall of the inclined surface into the longitudinal passage of the curved section at the bottom of the second drying chamber 6b and is discharged by the discharge device.
  • the cleaning port 15a at one end of the housing is discharged.
  • a hot drying gas is usually used to dry the sludge, and thus, it can be heated by a heating device, and the hot drying gas is sent to the second drying chamber 6b by the air blowing device. Or in the form of a drying device that uses a drying gas delivered by the air blowing device.
  • the bottom dry sludge drying apparatus of the present invention may include various configurations, for example, Fig. 11 shows still another embodiment of the sludge drying apparatus.
  • the sludge drying device 1 has two second drying chambers 6b1 and 6b2 and a first drying chamber 6a. Two juxtaposed flipping devices 7a, 7b are provided in the first drying chamber 6a, and the flipping assemblies 702a, 702b of each flipping device 7a, 7b correspond to a concave arcuate region of the partitioning plate 4.
  • a communication port 5 is formed in each of the concave arcuate regions of the partitioning plate 4, and a bridge member 401 is provided thereon.
  • the second drying chambers 6b1 and 6b2 respectively correspond to and are located below the respective recessed areas of the partitioning plate 4 so as to receive the sludge leaking from the first drying chamber 6a and to supply the drying gas thereto.
  • the combination of each of the second drying chambers 6b1 or 6b2 and the corresponding portion of the first drying chamber 6a is similar in structure and function to the sludge drying apparatus 1 disclosed above.
  • those skilled in the art can foresee the configuration of other bottom dry sludge drying devices, and details are not described herein.
  • the feed port 8 on the upper cover 3 in order to contribute to the improvement of the drying effect of the sludge, it is advantageous to arrange the feed port 8 on the upper cover 3 to be close to one end of the casing, and to provide the discharge port 9 in the casing.
  • the other end, and the exhaust port 10 is disposed at the same end as the feed port 8, and the flipping device 7a, 7b adopts a type which can both turn the sludge and push the sludge to move in the longitudinal direction G of the casing.
  • Flip device in order to contribute to the improvement of the drying effect of the sludge, it is advantageous to arrange the feed port 8 on the upper cover 3 to be close to one end of the casing, and to provide the discharge port 9 in the casing.
  • the other end, and the exhaust port 10 is disposed at the same end as the feed port 8, and the flipping device 7a, 7b adopts a type which can both turn the sludge and push the sludge to move in the longitudinal direction G of the casing
  • the drying gas entering the first drying chamber 6a has a continuous drying effect on the sludge and the shearing, breaking and turning action of the turning device 7a, 7b, and the granularity of the sludge is changed from large to small and gradually changes from particles to powder particles, and The water content is gradually lowered, and the turning devices 7a, 7b push the sludge gradually toward the discharge port 9 while turning the sludge.
  • the drying gas near the discharge port 9 can also dry the sludge on the upper side of the casing from the discharge port to the feed port in the longitudinal direction G of the casing, thereby prolonging the drying gas and Sludge contact time.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Microbiology (AREA)
  • Drying Of Solid Materials (AREA)
  • Treatment Of Sludge (AREA)

Abstract

L'invention concerne un dispositif de séchage de boue à séchage inférieur (1) comprenant un boîtier ; le boîtier comportant une plaque de séparation incurvée (4) en son sein pour diviser le boîtier en une première chambre de séchage (6a) et une seconde chambre de séchage (6b) ; un orifice d'alimentation (8) et une sortie d'air (10) sont situés au niveau d'une partie supérieure de la première chambre de séchage (6a) ; un orifice d'évacuation (9) est situé sur une paroi circonférentielle de la première chambre de séchage (6a) ; une entrée d'air (15) est située sur une paroi latérale ou au niveau d'une partie inférieure de la seconde chambre de séchage (6b) ; la plaque de séparation incurvée (4) a une partie creuse ; une ouverture de communication (5) est formée au niveau de la partie creuse ; un élément de pont (401) est situé au-dessus de l'ouverture de communication (5) pour former une ouverture latérale (402) entre l'élément de pont (401) et la plaque de séparation (4) ; un dispositif d'agitation de boue (7a, 7b) est situé dans la première chambre de séchage (6a), et comprend un arbre rotatif (701a, 701b) et un ensemble d'agitation (702a, 702b) fixé sur l'arbre rotatif ; et l'ensemble d'agitation (702a, 702b) est conçu pour être capable de couper, rompre et agiter la boue, et/ou une extrémité avant de l'ensemble d'agitation (702a, 702b) est conçue pour faire face et être adjacente à l'ouverture latérale (402) pour racler la boue dans ou autour de l'ouverture de communication (5) lorsque l'ensemble d'agitation (702a, 702b) tourne. L'invention concerne également un procédé pour sécher la boue à l'aide du dispositif de séchage de boue (1).
PCT/CN2015/099778 2015-01-07 2015-12-30 Dispositif et procédé de séchage de boue à séchage inférieur Ceased WO2016110210A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US15/542,050 US10408538B2 (en) 2015-01-07 2015-12-30 Bottom-drying sludge drying device and method
KR1020177021162A KR101969747B1 (ko) 2015-01-07 2015-12-30 바닥 건조형 슬러지 건조 장치 및 방법
EP15876710.3A EP3243802B1 (fr) 2015-01-07 2015-12-30 Dispositif et procédé de séchage de boue à séchage inférieur
JP2017536887A JP6351859B2 (ja) 2015-01-07 2015-12-30 底部乾燥型汚泥乾燥装置および方法

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CN201510025410.6A CN105819654B (zh) 2015-01-07 2015-01-07 底部干燥式污泥干化装置和方法
CN201510025410.6 2015-01-07

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EP (1) EP3243802B1 (fr)
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US20180010852A1 (en) 2018-01-11

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